(57) A motor control device has: a motor current detecting portion for detecting, based
on a current flowing between an inverter that drives a three-phase motor and a direct-current
power supply, a motor current flowing through the motor; a specified voltage value
producing portion for producing, based on the motor current, a specified voltage value
as a target value for a voltage to be applied to the motor, and outputting the specified
voltage value thus produced; a specified voltage value holding portion for holding
an earlier specified voltage value outputted from the specified voltage value producing
portion; and a specific period setting portion for setting a specific period based
on a voltage difference between two of U-phase, V-phase, and W-phase voltages of the
motor. Outside the specific period, the motor is controlled via the inverter based
on the specified voltage value outputted from the specified voltage value producing
portion, and, within the specific period, the motor is controlled via the inverter
based on the specified voltage value held by the specified voltage value holding portion.
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